DEVICE AND METHOD FOR ANTIALIASING HIGH RESOLUTION PIXEL DATA FOR LOWER RESOLUTION DISPLAY

摘要

Disclosed is a device and a method for antialiasing high resolution pixel data into low resolution pixel data for display at the low resolution. The high resolution pixel data defines pixel values for a plurality of horizontal scanlines with each scanline being defined by a plurality of the high resolution pixel data. The device includes a horizontal antialiazing unit, a first and a second storage units, and a vertical antialiasing unit. The horizontal antialiasing unit is adapted to sequentially receive the high resolution pixel data and sequentially antialiases N contiguous horizontal pixels associated with M scanlines to generate a set of horizontally antialiased pixel data for the M scanlines. The horizontally antialiased pixel data for the M scanline defines a set of vertically contiguous pixel data. The first and second storage units are capable of receiving and storing the horizontally antialiased pixel data associated with the M scanlines from the horizontal antialiasing unit. One storage unit receives and stores horizontally antialiased pixel data for the next M scanlines as a receiving buffer while the other storage unit provides the horizontally antialiased pixel data as an access buffer for vertical antialiasing. The vertical antialiasing unit is coupled to receive the horizontally-antialiased pixel data associated with the M scanlines from the access buffer. The vertical antialiasing unit performs vertical antialiasing on the vertically contiguous horizontally-antialiased pixel data to generate a pixel value for each NxM set of the high resolution pixel data.